Where should travelers buy a SIM card in Nha Trang, and how much does it cost?

For a longer stay, get a SIM at an operator’s store. One reported option cost about 350,000 VND for three months with 1.5 GB per day, which was sufficient for maps and everyday services.

A Viettel SIM can be bought without a passport at tour-selling agencies (e.g., places like 'Navigator', 'RIC'). Cost is around 500 RUB for a 15-day plan with 5 GB/day.

As an alternative to a physical SIM, you can activate an eSIM before landing, right on the plane, via Tripcom, from 12 RUB per day. This is comparable in price to a local SIM card (starting at 100,000 VND).

SIM cards are cheaper in the city than at the airport. Viettel and Mobifone are the most popular operators. For a 2-week stay, a typical package of 10–15 GB costs about 200,000–400,000 VND (600–1,200 RUB).

SIM cards bought at the airport often glitch and require frequent phone restarts, and cost roughly 3x more than on the street. One traveler paid 400,000 VND at the airport for an 'unlimited' plan that turned out to be capped at 5 GB/day, while the same SIM just outside the airport cost 150,000 VND. They ended up buying from street SIM sellers in Nha Trang for 100,000 VND, which worked reliably — and used that number to sign up for Grab and Max taxi apps.

For travelers, the safest option is to buy a SIM card at an official carrier office in the city. That reduces the risk of being put on a different plan than the one advertised.

Avoid buying from street vendors: instead of a plan with 5 GB per day, you may end up with only 1 GB or even a SIM that is valid for just a day.

A typical tourist SIM in Nha Trang costs about 250,000–350,000 VND, depending on the plan and data allowance.

If you’re staying longer, Viettel may be worth checking: it was described as one of the cheaper operators, but one plan required paying for 3 months upfront. The total came to roughly 1,200 RUB equivalent, so it makes more sense for relocation or a long stay than for a short holiday.

Even if you don’t buy a local SIM immediately after arrival, it’s usually easy to stay connected in Nha Trang: free Wi‑Fi is available at the airport, in hotels, and in many cafés, including small local spots.